VOGUE BATT. project / ?'s

[sonicboom]

I am doing a little project with my vigue and have some questions and info for anyone interested....

I have gotten my vogue to run on a couple different 3.7v batteries. If you look at your vogue's battery terminals let's call the "+" terminal "#1", numbering the termials 1-4, making the "-" terminal "#4". If you take a any 3.7v li-ion battery with three terminals and connect your + to #1, your - to #4, and your "T" or middle terminal to #3 your vogue will turn on and run like normal.
Recharging is another story...
I can't get my vogue to recharge any of the 3-terminal batteries I have tested. I have connected the terminals in all of the configurations I could think of with no good battery charging indication from my phone.

Question for anyone: If you know what the two middle battery terminals on the vogue (specifically that #2) are for and how they work please let me know!
Also, if you know how to get a 3-terminal battery recharging off of your vogue please let me know!